Low temperature conductivity of irradiated amorphous conducting carbon

✍ Scribed by A Sayeed; V Meenakshi; S Bhattacharya; SV Subramanyam; D Kanjilal

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 300 KB
• Volume: 47
• Category: Article
• ISSN: 0042-207X
• DOI: 10.1016/s0042-207x(96)00170-4

✦ Synopsis

Conducting carbon films prepared by pyrolysis ofperylene-3,4,9, lo-tetracarboxylic dianhydride (PTCDA) were subjected to high energy ion irradiation with 113+ ions (170 MeV). Different doses in the range 10"-70'3 were used, XRD observation (at room temperature) and electrical conductivity measurements down to 6.3 K were carried out on these films before and after irradiation. XRD shows that the structure remained amorphous as before. The temperature dependence of conductivity showed an interesting change below about 20 K, suggesting an emergence of a mobility gap in the electronic structure.